Co-invasion of similar invaders results in analogous ecological impact niches and no synergies

Tekiela, Daniel R.; Barney, Jacob N.

doi:10.1007/s10530-016-1269-0

Cited by 22 publications

(25 citation statements)

References 37 publications

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“…, Kumschick et al. , Tekiela and Barney ). Our framework can be integrated into this broader effort, as it specifically addresses instances where invasions and co‐occurring disturbances impact the same ecosystem functions, and thus understanding the recipient ecosystem's response to the disturbance over time is critical to accurately interpret the invader's effects.…”

Section: Resultsmentioning

confidence: 98%

“…Our results reinforce other findings that invader impacts can change through time (e.g., Dost al et al 2013, Iacarella et al 2015, Grove et al 2017 and can be shaped by other disturbances (e.g., Peltzer et al 2016). Furthermore, several recent frameworks have sought to understand the dependencies of invader impacts on environmental context (e.g., Py sek et al 2012, Blackburn et al 2014), including the influence of other disturbances (e.g., Didham et al 2007, Kumschick et al 2015, Tekiela and Barney 2017. Our framework can be integrated into this broader effort, as it specifically addresses instances where invasions and co-occurring disturbances impact the same ecosystem functions, and thus understanding the recipient ecosystem's response to the disturbance over time is critical to accurately interpret the invader's effects.…”

Section: Resultsmentioning

confidence: 99%

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Impacts of an invasive plant are fundamentally altered by a co‐occurring forest disturbance

Sokol

Kuebbing

Bradford

2017

Ecology

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Invasive species frequently co-occur with other disturbances, which can impact the same ecosystem functions as the invader. Yet invasion studies rarely control for the presence of these other disturbances, although their overlapping effects may influence the direction and magnitude of impacts attributed to the invader alone. Here, we ask whether controlling for the presence of a co-occurring disturbance, as well as the time since disturbance, yields different values of an invader's ecosystem effects than when these factors remain unaddressed. We used a chronosequence of six forest stands at a single site: five logged stands that each contained paired invaded-uninvaded plots of the forest understory invasive grass Microstegium vimineum, as well as one unlogged and uninvaded control stand. By controlling for the presence of both logging and invasion, we untangled the effects of each through time. We found that the co-occurring disturbance of logging can dramatically alter the measured effects of M. vimineum by amplifying, dampening, negating, or entirely reversing the direction of the invader's impacts. During its period of peak impact, logging amplified the invader's positive effect on the size of the soil microbial biomass pool by 24%, reduced the invader's positive effect on soil water holding capacity by 5%, negated the invader's positive effect on the particulate organic matter carbon pool (from a 9% increase to no significant effect), and reversed the direction of the invader's impact on net nitrogen mineralization rate from a 51% increase to a 52% decrease. Furthermore, the influence of logging on the invader's impacts was not static, but dynamic through time. The results from our site therefore demonstrate that failure to account for the impacts of a co-occurring disturbance, as well as the time since disturbance, can result in flawed inference about the nature of an invader's effects. Future research should determine how widespread such flawed inference might be among other invasive species and across different environmental contexts. To help guide such research, we describe a general framework for disentangling the overlapping effects of invasions and co-occurring disturbances through time.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Impacts of an invasive plant are fundamentally altered by a co‐occurring forest disturbance

Sokol

Kuebbing

Bradford

2017

Ecology

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“…There is increasing attention to accounting for important factors that may modulate invasive plant impacts, with abundance and time since introduction being most common. For example, Tekiela and Barney () found that the impacts of two invasive grasses varied strongly by their relative abundance. Likewise, Dostal et al () found the impact of giant hogweed ( Heracleum mantegazzianum ) on native plants declined within 30 years of initial invasion.…”

Section: Discussionmentioning

confidence: 99%

“…The impact of invasive plants is most commonly expressed as impacts on native plants (e.g., Vila & Weiner, ) and ecological processes (e.g., nutrient cycles, Ehrenfeld, ). While important research continues into invasive plant–native plant and invasive plant–environment interactions, interest is on the rise for identifying impacts of invasive plants on other invasive plants (e.g., invasion meltdown, Simberloff & Von Holle, ), identifying the impacts of multiple invasive species (e.g., co‐invasion, Tekiela & Barney, ), as well as impacts on resident animal populations and broader system‐level changes (e.g., trophic cascades, Seibold, Cadotte, MacIvor, Thorn, & Müller, ). Multi‐trophic interaction studies are more apparent and better documented in invasive animal (e.g., brown tree snake causing bird extinction, Wiles, Bart, Beck, & Aguon, ) and pathogen studies (David et al, ), but remain relatively rare in the invasive plant literature despite their potential cascading effects.…”

Section: Introductionmentioning

confidence: 99%

Invasive plants negatively impact native, but not exotic, animals

Fletcher

Brooks

Lakoba

et al. 2019

Global Change Biology

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Despite our growing understanding of the impacts of invasive plants on ecosystem structure and function, important gaps remain, including whether native and exotic species respond differently to plant invasion. This would elucidate basic ecological interactions and inform management. We performed a meta‐analytic review of the effects of invasive plants on native and exotic resident animals. We found that invasive plants reduced the abundance of native, but not exotic, animals. This varied by animal phyla, with invasive plants reducing the abundance of native annelids and chordates, but not mollusks or arthropods. We found dissimilar impacts among “wet” and “dry” ecosystems, but not among animal trophic levels. Additionally, the impact of invasive plants increased over time, but this did not vary with animal nativity. Our review found that no studies considered resident nativity differences, and most did not identify animals to species. We call for more rigorous studies of invaded community impacts across taxa, and most importantly, explicit consideration of resident biogeographic origin. We provide an important first insight into how native and exotic species respond differently to invasion, the consequences of which may facilitate cascading trophic disruptions further exacerbating global change consequences to ecosystem structure and function.

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“…Understanding ecological linkages between co-occurring invasive species is rapidly becoming a central question in ecology and conservation biology (Kuebbing et al 2013, Tekiela andBarney 2017). Broad-scale correlative patterns suggest that earthworms facilitate the success of non-native plant species in North American forests (Nuzzo et al 2009, Roth et al 2015.…”

Section: Discussionmentioning

confidence: 99%

Responses of non‐native earthworms to experimental eradication of garlic mustard and implications for native vegetation

et al. 2018

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Recent studies in invasion biology suggest that positive feedback among two or more introduced organisms facilitate establishment within a new range and drive changes in native plant communities. Here, we experimentally tested for relationships between native plants and two non‐native organisms invading forest habitats in North America: garlic mustard (Alliaria petiolata, Brassicaceae) and earthworms. In two forested sites, we compared understory vegetation and earthworm biomass in plots where garlic mustard was removed for three years, plots without garlic mustard invasion, and plots invaded by garlic mustard that was not removed. Earthworm biomass was highest in the plots with garlic mustard, and long‐term eradication of garlic mustard reduced earthworm biomass to levels similar to those observed in the uninvaded control plots. Invasion treatment, and the interactions between earthworm biomass and treatment, explained most of the variation in plant community composition and diversity—suggesting that earthworms alone do not necessarily drive forest understory floristic patterns. In contrast to broader geographic patterns indicating earthworms as the main driver of vegetation change in the presence of non‐native plants, we show that garlic mustard solely, or in conjunction with earthworm biomass, drives changes in native plant composition and diversity at the scale of individual forests. From a local management perspective, our data suggest that garlic mustard eradication can directly assist in the conservation of native plant communities and simultaneously reduce earthworm biomass.

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Co-invasion of similar invaders results in analogous ecological impact niches and no synergies

Cited by 22 publications

References 37 publications

Impacts of an invasive plant are fundamentally altered by a co‐occurring forest disturbance

Impacts of an invasive plant are fundamentally altered by a co‐occurring forest disturbance

Invasive plants negatively impact native, but not exotic, animals

Responses of non‐native earthworms to experimental eradication of garlic mustard and implications for native vegetation

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